Apparatus for feeding liquid and solid pulverized fuel into furnaces.



No. 668,787. l Patented Feb. 26, |90I. E. VETILLABD & P. E. SCHERDING, IR. APPARATUS FOR FEEDING LlllUlD AND SOLIb FULVERIZED FUEL INTO FUBNAGES.

Y (Application med Nov. 24, 1899.) (No Model.) l 2 Sheets-Sheet l.

Patented Feb. 26, I90I.

2 Sheets-Sheet 2.

(Lpplicntnn filed Nov. 24, 1899.)

A v E. vA. VETILLARD & P. E. SCHERDING, JR. APPARATUS FOR FEEDING LIQUID AND SDLID PULVERIZEIJ FUEL INTO FUBNACES.

(No Model.)

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"ArtNr ERNEST ARMAND VETILLARD AND PHILIPPE EUGENE SCI-IERDING, JR., OF

PARIS, FRANCE.

'APPARATUS FOR FEDING LIQUID AND SOLID PULVEBIZED FUI-IL INTO FURNCISl SPECIFICATION forming part of Letters Patent No. 668,787, dated February 26, 1901.

Application led November 24, 1899. Serial No. 738,194. (No model.)

To all whom it T/ty concern: A

Be it known that we, ERNEST ARMAND V- TILLARD, residing at 7 Rue Leneveux, and PHILIPPE EUGNE SCHERDING, J r., residing 5 at 22 Rue du Bouloi, Paris, France, citizens of the French Republic, have invented a new and useful Apparatus for Feeding Liquid and Solid Pulverized Fuel into Furnaces,of which the following is a specification.

1o This invention relates to a fuel-feeding apparatus forfurnaces, more especially designed for use in steam-generator furnaces, although it may be applied to any existing furnace and particularly Where a supply of steam or compressed air is available either directly in the case of boiler-furnaces or indirectly in other cases.

The object of the invention is to provide an apparatus of simple construction by which 2o a mixture o f liquid fuel, pulverized solid fuel, steam, and air may be fed to a furnace in the best condition for eective combustion.

The invention will be fully described here-v inafter, reference being had .to the accompaz5 nying drawings, in which- Figure l is a sectional plan View of the injecting apparatus for feeding both liquid and pulverized solid fuel mixed with steam and air. Fig. 2 is a front View of the same. Fig.

3o 3 is a diagram showing the application of our invention to a boiler-furnace. Fig. 4: is a vertical section of the suction stirring-box for the pulverized solid fuel, and Fig. 5 is a detail part;

An injector C has connected to it a pipe b5, through which liquid fuel is supplied from a reservoir. (Not shown.) A pipe t is also counected to the side of the injector and conveys steam from a source of supply to the annular 4o space c of the injector, and thereby draws the liquid fuel through the central tube c' ofl the injector, and the mixed steam'and liquid fuel passes into the annular space c2 of a second injector C3, the latter being perpendicular to the injector C. The cone c3 of the injector C3 containsanother cone c10 in the same axis, and a tube c11 communicates with the annular space between these cones. The tube' c11 also communicates with an injector, 5o the annular space c12 of which receives steam from a pipe o16, thereby drawing in air through the tube cl3, which is open to the atmosphere at one end, and the mixture of steam and air is delivered into the annular space between the cones c3 and 010 through the tube cu. A 55 pipe 015, in communication with the suction stirring-box X and the hopper containing the pulverized fuel, is coupled to the central orifice of the cone cw. The stream'of steam and air reaching the apparatus through the an- 6o nular space between the cones c3 and c10 produces an air-suction through the pipe 015, which air carries the pulverized fuel and injects it into the furnace simultaneously with the liquid fuel.

It should be observed that the pulverized fuel is in the axis of the stream and that therefore its combustion is greatly helped by the presence of the liquid gasied fuel surrounding it, this to such an extent thatvthe com- 7o bustion is perfectly smokeless.

The pipe C15 communicates with the bottom of the box X,already 1nentioned,Figs. 3 and 4,sit uated below the hopper Y, Fig. 3, containing the fuel. The hopper Y communicates with the` box X by a tube y, projecting through the cover to about half the height of the box and placed at the opposite side to the tube a: of the pipe C15. Near the tube y is another tube z, Vwhose inletz' through the cover of the box 8o is contracted and whose area may be altered, if necessary, by a valve z2. There is also a transverse partition or baile-plate t' between the inlet z and the outlet oo, rising from the bottom to about half the height of the box.

It willbe easilyunderstoodthat the suction set up in the pipe 015 by the injector draws pulverized fuel from the hopper Y and air through the tube z. By reason of the arrangement of the partition or baffle-plate t 9o and its height, the arrangement and length of the tube y, and the arrangement and area of the air-inlet c an intimate stirring of the solid particles with the air is produced, so that a streamv of air carrying the pulverized fuel reaches the injector by the pipe C15. The proportioning of the mixture can easily be varied by means of the device just described.

The injector C3 projects into a tubular body F, the bore of which, as shown in Fig. 1, 10o flares toward each end. The body F is furnished with two cylindrical bearings f' f2,

which fit tightly in a tube G, secured in the furnace-front. It is also provided with a ilangef at its outer end, which is secured by screws to the furnace-front.

The delivery end of the injector C3 is provided with a collar which screws into the outer end of the tubular body F. This collar is recessed in its periphery, as indicated by d', (see Fig. 5,) through which recesses air passes to the interior of the body F.

One meansof supplying steam to the injectors isillustrated in Fig. 3. A piper communicates with the steam-space of the boiler and is provided with a Valve V and a head 'v'.

'From this head the pipes tand o16 lead to their respective injectors, and each pipe is provided with a valve, as shown, in order that steam may be shut olf from either injector, if desired.

While we have illustrated only one injecting apparatus applied to the furnace, it is of course to be understood that two or more may be applied in a similar manner.

Having described the invention, we claim l. In an apparatus for feeding fuel to a furnace, the combination with an injector C, a liquid-fuelsupply pipe and a steam-supply pipe leadinginto the injector, an injector C3 communicating with the furnace and having its axis perpendicular to the axis of the injector C' and having an annular space into which the mixture ot' steam and liquid fuel is delivered from the injector C', a cone 010 supported within the cone c3 of the injector C3 with an annular space between them, a pipe to supply pulverized solid fuel connected to the cone C10, and means to supply a mixture of steam and air to the annular space between said cones, substantially as set forth.

2. In an apparatus for feeding fuel to a furnace, the combination with an injector C, a liquid-fuel-supply pipe and a steam-supply pipe leading into the injector, an injector C3 communicating with the furnace and having its axis perpendicular to the axis of the iujector C and having an annular space into which the mixture of steam and liquid fuel is delivered from the injector C', a cone ci supported Within the cone c3 of the injector C3 with an annular space between them, a j

pipe to supply pulverizcd solid fuel connected to the cone 010, means to supply a mixture of steam and air to the annular space between said cones, and means to supply an annular current of air surrounding the mixture of liquid and pulverized solid fuel, steam and air which issues from the discharge end of the injector C3, substantially as set forth.

3. In an apparatus forsupplying pulverized solid fuel to a furnace, the combination of a hopper, a closed box X, a pipe leading from the hopper through the top of the box near one side thereof and terminating about midway the dept-h of said box, a discharge-pipe leading from the bottom of the box near the opposite side thereof, a bafeplate secured to the bottom of the box and extending upwardly in a plane between the inlet and exit openings to a height substantially level with the lower end of the inlet-pipe, an air-supply pipe secured to the top of the box and communicating With the interior through a contracted opening, and an injector with which said discharge-pipe communicates, substantially as set forth.

4. In an apparatus forsupplyingpulverized solid fuel to a furnace, the combination of a closed box X, a baffle-plate t within the box, an inlet-pipe y for the fuel on one side of the plate, an outlet-pipe a: for the fuel on the other side of the plate, an injector lo which the outlet-pipe is connected, and an air-supply pipe .z' having valved communication with the interior of the box, substantially as set forth.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

ERNES" ARMAIYD V'lIlhhAltl). PHILIPPE EUGENE SCIIEEDING, JUNlt.

Witnesses:

CHARLES VICTOR THIERRY, EDWARD P. MACLEAN. 

